Floating reamer



y 3, 1932. c. E. WYRICK 1,856,406

' FLOATING REAMER Filed Nov. 2, 1928 2 Sheets-Sheet l 6 15 a 47 IN ENTOR UY. JKM

ATTO RN EY C. E. WYRICK May 3, 1932.

W lNVEETOR I! It Mill F L mu ATTORNEY Patented May 3, 1932 y v a 1,856,406

UNITED sr'rss arena Farce CLAYTON E. W ERICK, OF DETROIT, MICHIGAN, ASSIGNOR TO GAIRING TOOL COMPANY, OF DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN FLOATING BEAMER Application filed November 2, 1928. Serial No. 316,719.

My invention relates to reamers and more reamer as it would appear in the work, with particularly to a driving mechanism for floatparts broken away and in section.

ing re amers. Figure 2 is a crosssectional view taken on One object of my invention is to provide a or about line 22 of Figure 1. reamer having a universally movable driv- Figure 3 is a fragmentary elevation and ing connection between the reamer and a holdlongitudinal sectional view through the or Supported in a suitable chuck, the driving reamer, showing the polygonal-shaped head force of the universal'conne'ction being apofthe driving connection seated in a like plied to the reamer in advance, or substantialshaped socket at the forward end of the 10 1y near the forward end of the tool, adjareamer. cent that portion of the reamer carrying the Figure 4 is a cross-sectional view taken maximum load of the cutting operation, with on or about line 4ct of Figure 1, showing an the reamer blades trailing in the path of the end elevation of the holder.

bore of the work in order that the tool may Figure 5 is a side elevation of an inserted 15 align itself with the bore regardless of blade reamer and holder, with parts broken whether the machine spindle or holder is or away and in section.

is not in axial alignment with the hole to v Figure 6 is a semi-elevation and cross-secbe reamed. tional view through the reamer shown in Fig -Another feature of the invention is the ure 5, with the end thrust cap removed to dis- 0 universal driving" connection between the close the polygonal-shaped driving socket 7o reamer and the holder, consisting of a suitand the correspondingly shaped head of the able shaftprovided at each end with a polygdriving connection in position.

onal-shaped driving head or nose, respec- In'floating reamers it has been customary tively extending into asubstantially completo drive the reamer by means engaging the mentary shaped socket at the forward end of rear portion of the tool body, and as aresult the reamer, and at the rear end into a simithere is atendency to restrict the movement larly shaped socket in the holder, thereby of the reamer so that it cannot float freely providing a double universal joint, permitwith reference to the driving member.

ting the tool to follow through holes on a true h pres nt lnventlon is designed to over- 30 line with-the axis of the hole regardless of the 111 the e j ctions to the prior art by pro l d. viding a driving connection having a dou- A f rth r bject of th invention is to pr ble universal movement and wherein the drivvide a reamer with a pilot on its forward end 11g force is applied substantially adjacent and universal driving means as described to or preceding the forward end of the cutting permit said reamer to trail said pilot through k the maXlmum WOIkIIIg 1 m as th bore applied to the blades.

With the foregoing and other objects T951111) I the dridng force view which will appear as the description P at U113 PP augmented y a lead p m proceeds, the invention further resides in the i P0111011. t i f follows the combination and arrangement of parts and in fi lt t 'f it y the details of construction hereinafter de- 53 ,5 f f mg ac Ion 1S scribed and claimed, it being understood that M 18mg 0 18 mammg Operation. changes may-be made in the prec1se embodi- In the prior art referred to the force ap- 45 ment of the lnvention shown without departplied to the reamer was a pushing force which g mr l of the in many instances resulted in causing the tool I the dmWmgs c p y g thls speclh to cut a tapered or bell mouthed hole and cation: urged a departure of the axis of the ream- Figure 1 is a side elevation of the tool super f th i f th work and es e ially ported in a holder and chuck, showing the was this true if the holder of the reamer is preferably integral and extends forward of the cutting blades 13..

C denotes an arc-shaped polygonal socket at the forward end of the reamer body and D a thrustcap'or plug screwed into the reamer, closing the opening beyond the socket. E is a disc inserted adjacent the cap.

F indicates a shaft, extending through a relatively larger'bore in the reamer body and at its forward end is "formed with an arc-shaped polygonal driving head or nhsev F -fitting into the complementary socket C,with the arc-shaped end bearing against the disc E, held in position by the thrust cap. 1

The shaft F fits loosely in the bore reamer in order that the reamer may'adapt "itselfto any variation occurring between the axis of the holder and the bore of the work, and at the rear end is provided with an areshaped polygonal head F", fitted to a corresponding socket G in the tool holderG, in

\ turn supported in a chuck H.

I denotes a set screw extending through the wall of the holder into a peripheral groove in the shaft F adjacent the hexagonal head at the rear end of the shaft. I

J indicates an L shaped member, adjustably-supported at the end of'the tool holder by a set screw Kextending into the body of the holder, having beveled edges J slidable in a correspondingly beveled guide Gr provided at the end of the holder G.

The member J hasa V-shaped notch in that portion of the plate overlapping the end of the toolholder, which upon adjusting the set screw K-is designed tolimit the downward sagof the shaft F, to support the reamer when free from thework,

Figures 5 and 6 show a reamer fitted with interchangeable cutting blades. 13, provided with a double universal drivingiconnection similar. to'that previously described, and it should be noted that the portion of the inserted blade B is circle-ground which substantiallv serves as one form' of pilot for.

this type of reamer.

Having thus described my invention what- I claim is: 1. In a tool of the character described, a reamerbody portion, fitted with cutter blades and constructed with a central longitudinal bore, including a polygonal shaped socket'at of the its forward end; means for closing the end of said socket; and a driving connection, com prising a shaft extending loosely through the bore, having an arc-shaped polygonal driving head, fitted to the polygonal shaped socket in the reamer body portion, whereby said reamer body portion, including its cutter blades located back of the polygonal shaped driving socket, are adapted to follow the driving force'applied to the reamer body.

2. In a tool ofithe character described, a

reamer body portion fitted with a plurality of cutting blades, having a central longitudinal bore with a polygonal shaped socket at its forward end; means for closing the end of said socket; holding means provided with a polygonal socket; a driving connection'conr:

prising a relatively short shaft extending through the bore in the reamer body portion, having an-arc-shaped polygonal head at each end respectively fitted to the sockets in the holding meansand in the reamerbodyportion 1 whereby the body of the reamer may float, under torsional load,-said reamer including 7 its cutter blades being locatedbackof the polygonal shaped socket in; the reamer body, 2

portion, that thecutting blades may follow the driving force applied "to the reamer body portion through the driving connection. 7

3; In a tool of the character described, a reamer body portion having a central longitudinal bore with a polygonal shaped socket at its forward end; means for closing. the:

end of said socket; atool holder provided with a polygonal socket; adriving connection 7 comprising a relatively short shaft extending. through the bore in the reamerbody,

having an arc-shaped polygonal'head at each end respectively fitted .to the sockets in the tool holder and body of the reamer, thereby 'permittingthe body of the reamer tofioat under torsional load; and a plurality of removable cutter blades supported in grooves, extendin rearwardly from' the polygonal.

shaped socket in the reamer bodyportion,

whereby the cutting blades are adapted to follow the driving force applied to the reamtion. 7

l. In a tool of the character described,a

reamer body portion having a central longiwith a polygonal socket; 'a'driving connecllC er body portion through the driving connec-v tion comprising a relatively short shaft extending through the bore in'the reamer body,

having an arc shapedpolygonal head at each I end respectively fitted to the sockets in the holder and body of the reamer, thereby permitting the body of the reamer to float under torsional load; a set screw supported in said tool holder having a projecting end extending into a peripheral groove in the shaft of the driving connection; and an adjustable forked member located at the end of the tool holder for supporting the driving connection upon the Withdrawal of the reamer body from the Work, said reamer body including cutter blades located back of the polygonal shaped driving socket in the body, whereby the cutting blades are adapted to follow the driving force applied to the reamer body through the driving connection.

In testimony whereof, I sign this specification.

CLAYTON E. WYRIGK. 

